INSPECTION PROCEDURE G-4: Windshield Wiper and Washer: Windshield intermittent wiper interval cannot be adjusted.: Diagnosis

WARNING: This page is about a different car, the 2005 Dodge Stratus and 2005 Chrysler Sebring. However, it is still accessible from the selected car via links, so may be relevant.

Required Special Tools:

MB991223: Test Harness Set
MB991502: Scan Tool (MUT-II)
MB991529: Diagnostic Trouble Code Check Harness

STEP 1. Check method of the input signal
Q: Which is to be used, the scan tool or a voltmeter to check the input signal?

Scan tool MB991502 : Go to Step 2.

Voltmeter : Go to Step 3.
STEP 2. Check the input signal (by using scan tool MB991502).
Check the input signals from the windshield intermittent wiper interval adjusting knob.

NOTE: If the windshield intermittent wiper interval adjusting knob is rotated from "FAST" to "SLOW" when the ignition switch is at the "ON" position, the ETACS-ECU will send a signal around the medium knob position.

CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502.
1. Connect scan tool MB991502 to the data link connector.
2. Check that the tone alarm of scan tool MB991502 sounds when the input signal enters.
Q: Does the tone alarm of scan tool MB991502 sound when the input signal enters?

YES : Go to Step 4.

NO: Scan tool MB991502 does not sound when the windshield intermittent wiper interval adjusting knob is turned from "FAST" to "SLOW": Refer to INSPECTION PROCEDURE O-16 "THE WINDSHIELD INTERMITTENT WIPER INTERVALS ADJUSTING KNOB SIGNAL IS NOT SENT TO THE ETACS-ECU ."

Fig 1: Connecting Scan Tool MB991502 To Data Link Connector
Courtesy of DAIMLERCHRYSLER CORPORATION
STEP 3. Check the input signal (by using a voltmeter).
Check the input signals from the windshield intermittent wiper interval adjusting knob.

NOTE: If the windshield intermittent wiper interval adjusting knob is rotated from "FAST" to "SLOW" when the ignition switch is at the "ON" position, the ETACS-ECU will send a signal around the medium knob position.
1. Use special tool MB991529 to connect a voltmeter between ground terminal 4 or 5 and ETACS-ECU terminal 9 of the data link connector.
2. Check that the voltmeter indicator deflects once when the input signal enters.
Q: Does the voltmeter indicator deflect?

YES : Go o Step 4.

NO: The voltmeter needle does not fluctuate when the windshield intermittent wiper interval adjusting knob is turned from "FAST" to "SLOW": Refer to INSPECTION PROCEDURE O-16 "THE WINDSHIELD INTERMITTENT WIPER INTERVALS ADJUSTING KNOB SIGNAL IS NOT SENT TO THE ETACS-ECU ."

Fig 2: Connecting Voltmeter Between Ground Terminal 4 And 5
Courtesy of DAIMLERCHRYSLER CORPORATION
STEP 4. Replacement of ECU
1. Replace the front-ECU.
2. The windshield intermittent wiper interval should be changed.
Q: Is it possible to adjust the windshield intermittent wiper interval?

YES : No action is necessary and testing is complete.

NO: Replace the ETACS-ECU. The windshield intermittent wiper interval should be changed.